import Long from 'long';

const formatJson = (obj = 0) => {
  const isLong = obj instanceof Long;
  if (isLong) {
    return obj;
  }
  const type = typeof obj;
  if (type === 'bool' || type === 'string' || type === 'number') {
    return obj;
  }
  if (Array.isArray(obj)) {
    const arrRet = [];
    obj.forEach((item) => {
      arrRet.push(formatJson(item));
    });
    return arrRet;
  }
  const hashRet = {};
  const keys = Object.keys(obj);
  keys.forEach((key) => {
    hashRet[key] = formatJson(obj[key]);
  });
  return hashRet;
};

const transferToLong = (obj = 0) => {
  const { low, high } = obj;
  if (typeof low !== 'undefined' && typeof high !== 'undefined') {
    const srret = new Long(low, high, true);
    return srret;
  }
  const type = typeof obj;
  if (type === 'bool' || type === 'string' || type === 'number') {
    return obj;
  }
  if (Array.isArray(obj)) {
    const arrRet = [];
    obj.forEach((item) => {
      arrRet.push(transferToLong(item));
    });
    return arrRet;
  }
  const hashRet = {};
  const keys = Object.keys(obj);
  keys.forEach((key) => {
    hashRet[key] = transferToLong(obj[key]);
  });
  return hashRet;
};

const toNumber = (obj = 0) => {
  if (typeof obj === 'string') {
    return obj - 0;
  }
  if (typeof obj === 'number') {
    return obj;
  }
  const { low, high, unsigned = true } = obj;
  if (typeof low !== 'undefined' && high !== 'undefined') {
    return new Long(low, high, unsigned).toNumber();
  }
};

const toLong = (obj = 0) => {
  if (typeof obj === 'string') return Long.fromString(obj);
  const { low, high, unsigned = true } = obj;
  if (typeof low !== 'undefined' && high !== 'undefined') {
    return new Long(low, high, unsigned);
  }
  if (typeof obj === 'number') {
    return Long.fromNumber(obj);
  }
  return new Long();
};

const numToString = (obj = 0) => {
  if (typeof obj === 'undefined') {
    ('');
  }
  if (typeof obj === 'string') return obj;
  if (typeof obj === 'number') return obj + '';
  if (typeof obj.low !== 'undefined' && typeof obj.high !== 'undefined') {
    return new Long(obj.low, obj.high, true).toString();
  }
  return new Long(obj).toString();
};

const Uint8ArrayToString = (fileData) => {
  var dataString = '';
  for (var i = 0; i < fileData.length; i++) {
    dataString += String.fromCharCode(fileData[i]);
  }

  return dataString;
};

const stringToUint8Array = (str) => {
  var arr = [];
  for (var i = 0, j = str.length; i < j; ++i) {
    arr.push(str.charCodeAt(i));
  }
  var tmpUint8Array = new Uint8Array(arr);
  return tmpUint8Array;
};

const _keyStr = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
// private method for UTF-8 encoding
var _utf8_encode = function (string) {
  string = string.replace(/\r\n/g, '\n');
  var utftext = '';
  for (var n = 0; n < string.length; n++) {
    var c = string.charCodeAt(n);
    if (c < 128) {
      utftext += String.fromCharCode(c);
    } else if (c > 127 && c < 2048) {
      utftext += String.fromCharCode((c >> 6) | 192);
      utftext += String.fromCharCode((c & 63) | 128);
    } else {
      utftext += String.fromCharCode((c >> 12) | 224);
      utftext += String.fromCharCode(((c >> 6) & 63) | 128);
      utftext += String.fromCharCode((c & 63) | 128);
    }
  }
  return utftext;
};

// private method for UTF-8 decoding
// /* eslint-disable */
var _utf8_decode = function (utftext) {
  var string = '';
  var i = 0;
  var c = 0;
  // var c1 = 0;
  var c2 = 0;
  var c3 = 0;
  while (i < utftext.length) {
    c = utftext.charCodeAt(i);
    if (c < 128) {
      string += String.fromCharCode(c);
      i++;
    } else if (c > 191 && c < 224) {
      c2 = utftext.charCodeAt(i + 1);
      string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
      i += 2;
    } else {
      c2 = utftext.charCodeAt(i + 1);
      c3 = utftext.charCodeAt(i + 2);
      string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
      i += 3;
    }
  }
  return string;
};

function Base64() {
  this.encode = function (input) {
    var output = '';
    var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
    var i = 0;
    input = _utf8_encode(input);
    while (i < input.length) {
      chr1 = input.charCodeAt(i++);
      chr2 = input.charCodeAt(i++);
      chr3 = input.charCodeAt(i++);
      enc1 = chr1 >> 2;
      enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
      enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
      enc4 = chr3 & 63;
      if (isNaN(chr2)) {
        enc3 = enc4 = 64;
      } else if (isNaN(chr3)) {
        enc4 = 64;
      }
      output = output + _keyStr.charAt(enc1) + _keyStr.charAt(enc2) + _keyStr.charAt(enc3) + _keyStr.charAt(enc4);
    }
    return output;
  };

  // public method for decoding
  this.decode = function (input) {
    var output = '';
    var chr1, chr2, chr3;
    var enc1, enc2, enc3, enc4;
    var i = 0;
    input = input.replace(/[^A-Za-z0-9+/=]/g, '');
    while (i < input.length) {
      enc1 = _keyStr.indexOf(input.charAt(i++));
      enc2 = _keyStr.indexOf(input.charAt(i++));
      enc3 = _keyStr.indexOf(input.charAt(i++));
      enc4 = _keyStr.indexOf(input.charAt(i++));
      chr1 = (enc1 << 2) | (enc2 >> 4);
      chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
      chr3 = ((enc3 & 3) << 6) | enc4;
      output = output + String.fromCharCode(chr1);
      if (enc3 != 64) {
        output = output + String.fromCharCode(chr2);
      }
      if (enc4 != 64) {
        output = output + String.fromCharCode(chr3);
      }
    }
    output = _utf8_decode(output);
    return output;
  };
}

export { formatJson, transferToLong, toLong, toNumber, numToString, Uint8ArrayToString, stringToUint8Array, Base64 };
